Method and system facilitating improved downlink MIMO sector throughput in the presence of UE DC-offset

Abstract

The present invention provides a method and system for facilitating improved downlink MIMO sector throughput in the presence of UE DC-offset. The system receives BLER from a plurality of UEs and tracks by L1 computing the DL BLER in a UE; checks if the BLER from the UE allocated with an RB containing a DC subcarrier is above a target BLER and if so the L1 increases the power of the RE containing the DC-subcarrier in steps of 3 dB. If the BLER improves in the UE, the L1 stops further increase of power on the DC subcarrier RE. The L1 maintains the improved UE/sector throughput and the subcarrier RE power. The system further supports a plurality of 5G NR UEs with different bandwidth wherein the DC-carrier of each UE can be worked out by the L2 by a set of predefined instructions.

We claim: 
     
       1. A system ( 110 ) for facilitating improved sector throughput, said system comprising:
 one or more processors operatively coupled to a plurality of user equipments (UE), said plurality of UEs further having a downlink communication channel with a multi-input multi output (MIMO) base-station,
 wherein the one or more processors ( 202 ) that executes a set of executable instructions that are stored in a memory ( 204 ), upon execution of which, the processor ( 202 ) causes the system ( 110 ) to:
 receive, a set of data packets from the plurality of UEs ( 104 ), said set of data packets pertaining to downlink (DL) feedback communication signals from each UE; 
 extract, a first set of attributes from the received set of data packets, the first set of attributes pertaining to a DL Block Error Rate (BLER) in each said UE; 
 determine, based on the extracted first set of attributes, an average BLER of each said UE; 
 compare the determined average BLER of each said UE with a predetermined target BLER; 
 determine if each said UE is allocated with a resource block (RB) containing a direct current (DC) subcarrier; 
 increase a DC subcarrier power level in the RB containing the DC-subcarrier up to a maximum pre-determined level if the determined average BLER is greater than the predetermined target BLER in a UE and the UE is allocated with the resource block (RB) containing the DC subcarrier module. 
 
 
 
     
     
       2. The system ( 110 ) as claimed in  claim 1 , wherein a throughput of said UE increases to a predefined level in response to a decrease in the BLER to a pre-determined level. 
     
     
       3. The system ( 110 ) as claimed in  claim 1 , wherein if BLER improves in the UE to a pre-determined level, the one or more processors is further configured to:
 prevent scheduling of further power increase on the DC-subcarrier; and, 
 continue to maintain the DC-subcarrier power on the UE until the UE has come closer to the base-station in terms of power level. 
 
     
     
       4. The system ( 110 ) as claimed in  claim 1 , wherein the one or more processors is further configured to:
 de-boost the increased DC-subcarrier power level on the RB containing the DC-carrier; and, 
 maintain a full throughput in the RB containing the dc-carrier. 
 
     
     
       5. The system ( 110 ) as claimed in  claim 4 , wherein the one or more processors is further configured to:
 determine whether the UE is receiving a downlink communication signal with a higher signal strength based on tracking of one or more UE power headroom reports received from the UE; and 
 reduce the boost of the dc-carrier power level by a predefined amount. 
 
     
     
       6. The system ( 110 ) as claimed in  claim 1 , wherein the one or more processors is further configured to:
 determine whether the UE power level has moved closer to the MIMO base station power level based on one or more reports on tracking of one or more UE Power Headroom reports received from the UE; and 
 reduce the boost of the dc-carrier power level by a predefined amount. 
 
     
     
       7. The system ( 110 ) as claimed in  claim 1 , in case the BLER does not improve to less than the predetermined target BLER via boosting the dc subcarrier power level, the one or more processors is configured to:
 conclude that the BLER is not due to DC-offset leakage; and, 
 terminate increase in the dc subcarrier power level based on the conclusion that the BLER is not due to DC-offset leakage. 
 
     
     
       8. The system ( 110 ) as claimed in  claim 1 , wherein the one or more processors are operatively coupled to a plurality of bandwidth channels to support the plurality of UEs to receive a full carrier bandwidth. 
     
     
       9. The system ( 110 ) as claimed in  claim 8 , wherein the one or more processors are configured to support a plurality of UEs with different bandwidth parts wherein the DC-subcarrier of each UE is located at a different bandwidth of the 5G spectrum. 
     
     
       10. The system ( 110 ) as claimed in  claim 9 , wherein the one or more processors are configured to determine a location of the DC subcarrier of each UE belonging to different bandwidth. 
     
     
       11. The system ( 110 ) as claimed in  claim 1 , wherein the DC carrier power level increases in steps of predetermined decibels (dB) to achieve a lower BLER than the predetermined target BLER. 
     
     
       12. A method for facilitating improved sector throughput, said method comprising:
 receiving, by one or more processor, a set of data packets from the plurality of UEs ( 104 ), said set of data packets pertaining to downlink (DL) feedback communication signals from each UE,
 wherein the one or more processors operatively coupled to a plurality of user equipments (UE), said plurality of UEs further having a downlink communication channel with a multi-input multi output (MIMO) base-station, 
 wherein the one or more processors ( 202 ) that executes a set of executable instructions that are stored in a memory ( 204 ); 
 
 extracting, by the one or more processors, a first set of attributes from the received set of data packets, the first set of attributes pertaining to a DL Block Error Rate (BLER) in each said UE; 
 determining, by the one or more processors, based on the extracted first set of attributes, an average BLER of each said UE; 
 comparing, by the one or more processors, the determined average BLER of each said UE with a predetermined target BLER; 
 determining, by the one or more processors, if each said UE is allocated with a resource block (RB) containing a direct current (DC) subcarrier; 
 increasing, by the one or more processors, a DC subcarrier power level in the RB containing the dc-subcarrier up to a maximum pre-determined level if the determined average BLER is greater than the predetermined target BLER in a UE and the UE is allocated with the resource block (RB) containing the DC subcarrier module. 
 
     
     
       13. The method as claimed in  claim 12 , wherein decrease in the BLER to a pre-determined level leads to an increase in throughput of said UE to a predefined level. 
     
     
       14. The method as claimed in  claim 12 , wherein if BLER improves in the UE to a pre-determined level, the method further comprises the steps of:
 prevent scheduling, by the one or more processors, further power increase on the DC-subcarrier; and 
 continuing, by the one or more processors, to maintain the DC-subcarrier power on the UE until the UE has come closer to the base-station in terms of power level. 
 
     
     
       15. The method as claimed in  claim 12 , wherein the method further comprises the steps of:
 deboosting, by the one or more processors, the increased DC-subcarrier power level on the RB containing the dc-carrier; and, 
 maintaining, by the one or more processors, a full throughput in the RB containing the dc-carrier. 
 
     
     
       16. The method as claimed in  claim 12 , wherein the method further comprises the steps of:
 determining, by the one or more processors, whether the UE power level has moved closer to the MIMO base station power level based on tracking of one or more UE Power Headroom reports received from the UE; and, 
 reducing, by the one or more processors, the boost of the dc-carrier power level by a predefined amount. 
 
     
     
       17. The method as claimed in  claim 12 , wherein the method further comprises the steps of:
 determining, by the one or more processors, whether the UE is receiving a Downlink communication signal with a higher signal strength based on one or more reports on tracking of one or more UE Power Headroom reports received from the UE; and, 
 reducing, by the one or more processors, the boost of the dc-carrier power level by a predefined amount. 
 
     
     
       18. The method as claimed in  claim 12 , wherein in case the BLER does not improve to less than the predetermined target BLER via boosting the dc subcarrier power level, the method further comprises the steps of:
 concluding, by the one or more processors, that the BLER is not due to DC-offset leakage; and, 
 terminating, by the one or more processors, increase in the dc subcarrier power level based on the conclusion that the BLER is not due to DC-offset leakage. 
 
     
     
       19. The method as claimed in  claim 12 , wherein the one or more processors are operatively coupled to a plurality of bandwidth channels to support the plurality of UEs to receive a full carrier bandwidth. 
     
     
       20. The method as claimed in  claim 19 , wherein the one or more processors are configured to support a plurality of UEs with different Bandwidth wherein the DC-subcarrier of each UE is located at a different bandwidth of the 5G spectrum.